Cooling system of lighting apparatus using microwave energy

Abstract

In a lighting apparatus using microwave energy including a magnetron for generating microwave energy, a bulb for generating lights by the microwave energy, a wave guide for connecting the magnetron and the bulb and transmitting the microwave energy generated in the magnetron to the bulb and a casing housing the magnetron and the wave guide and combining with the bulb, a cooling system of a lighting apparatus using microwave energy comprises a heat exchanger installed to the exterior of a magnetron and having a coolant path, a radiating unit installed to the exterior of a casing and radiating heat of the coolant heated while passing the path of the heat exchanger, and a flow generating means installed between an outlet of the radiating unit and an inlet of the heat exchanger in order to make the coolant circulate the heat exchanger and the radiating unit.

What is claimed is:  
     
       1. In a lighting apparatus using microwave energy including a magnetron for generating microwave energy, a bulb for generating lights by the microwave energy, a wave guide for connecting the magnetron and the bulb and transmitting the microwave energy generated in the magnetron to the bulb and a casing housing the magnetron and the wave guide and combining with the bulb, a cooling system of a lighting apparatus using microwave energy, comprising: 
       a heat exchanger installed to the exterior of a magnetron and having a coolant path;  
       a radiating unit installed to the exterior of a casing and radiating heat of the coolant heated while passing the coolant path of the heat exchanger; and  
       a flow generating means installed between an outlet of the radiating unit and an inlet of the heat exchanger in order to make the coolant circulate the heat exchanger and the radiating unit.  
     
     
       2. The system of  claim 1 , wherein a coolant tank filled with a coolant is installed between the radiating unit and the flow generating means. 
     
     
       3. The system of  claim 1 , wherein the coolant is water. 
     
     
       4. The system of  claim 1 , wherein a heat exchanger is formed as one body with the exterior of the magnetron. 
     
     
       5. The system of  claim 1 , wherein a heat exchanger is additionally installed at the exterior of the wave guide. 
     
     
       6. The system of  claim 1 , further comprising: 
       a high voltage generator for supplying high voltage power in order to make the magnetron generate microwave energy; and  
       a heat exchanger installed to the exterior of the high voltage generator.  
     
     
       7. The system of  claim 1 , further comprising: 
       a condenser; and  
       a heat exchanger installed to the exterior of the condenser.  
     
     
       8. The system of  claim 1 , wherein the heat exchanger is a coil-shaped tube surrounding the exterior of the magnetron. 
     
     
       9. The system of  claim 1 , wherein the heat exchanger includes: 
       a body unit;  
       a receiving portion formed at the central portion of the body unit in order to receive the magnetron;  
       a coolant inlet hole formed at the side of the body unit for an inflow of a coolant;  
       a coolant outlet hole formed at the other side of the body unit for a discharge of the coolant; and  
       a coolant path formed inside the body unit in order to connect the coolant inlet hole and the coolant outlet hole.  
     
     
       10. In a lighting apparatus using microwave energy including a magnetron for generating microwave energy, a bulb for generating lights by the microwave energy, a wave guide for connecting the magnetron and the bulb and transmitting the microwave energy generated in the magnetron to the bulb and a casing housing the magnetron and the wave guide and combining with the bulb, a cooling system of a lighting apparatus using microwave energy, comprising: 
       a heat exchanger installed to the exterior of internal heat generating units of the lighting apparatus and having a coolant path;  
       a radiating unit installed to the exterior of a casing and radiating heat of a coolant heated while passing the coolant path of the heat exchanger; and  
       a flow generating means installed between an outlet of the radiating unit and an inlet of the heat exchanger in order to make the coolant circulate the heat exchanger and the radiating unit.  
     
     
       11. The system of  claim 10 , wherein the internal heat generating units are a magnetron, a wave guide and a high voltage generator. 
     
     
       12. The system of  claim 10 , wherein a condenser is additionally included in the internal heat generating units. 
     
     
       13. The system of  claim 10 , wherein the plurality of heat exchangers installed to the internal heat generating units are connected in series. 
     
     
       14. The system of  claim 10 , wherein the heat exchanger includes: 
       a body unit having a receiving portion for receiving the internal heat generating units and a plurality of coolant paths;  
       a coolant inlet hole formed at the end of the plurality of coolant paths for an inflow of a coolant; and  
       a coolant outlet hole formed at the other end of the plurality of coolant paths for a discharge of the coolant.  
     
     
       15. The system of  claim 10 , wherein the casing of the lighting apparatus is sealed in order to prevent penetration of external impurities. 
     
     
       16. The system of  claim 10 , further comprising: 
       a fan placed inside the casing in order to generate an air flow.